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  • Our galaxy is 10 billion years old. The Earth is only 4.5 billion years old. We are a firefly flicker in the great astrobiology of the galaxy.

    Geoffrey Marcy
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    "Hunting for the Great Galactic Internet". Interview with Slate, www.slate.com. April 8, 2012.
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Our galaxy is 10 billion years old. The Earth is only 4.5 billion years old. We are a firefly flicker in the great astrobiology of the galaxy. - Geoffrey Marcy
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